Decompression modelling of natural gas-hydrogen mixtures using the Peng-Robinson equation of state
| Autor: | Cheng Lu, Ajit R Godbole, Xiong Liu, Guillaume Michal |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Equation of state
Combining rules Materials science Hydrogen Renewable Energy Sustainability and the Environment business.industry Mixing (process engineering) Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Mechanics Computational fluid dynamics 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Fuel Technology chemistry Natural gas Hydrogen fuel 0210 nano-technology business Shock tube |
| Zdroj: | International Journal of Hydrogen Energy. 46:15793-15806 |
| ISSN: | 0360-3199 |
| Popis: | A wide application of hydrogen energy is seen as a viable strategy to reduce the excessive release of CO2 in the atmosphere. Large demand requires the hydrogen to be distributed through pipelines. While blending hydrogen into existing natural gas pipelines is recommended as a transition option to progressively increase the energy share of hydrogen, it is important to develop a better understanding of the decompression characteristics of Natural Gas-Hydrogen (NGH2) mixtures, to ensure that the pipelines are capable of arresting a running ductile fracture. In this paper, Computational Fluid Dynamics (CFD) models incorporating the Peng-Robinson (PR) Equation Of State (EOS) were used to simulate the decompression of NGH2 mixtures. The PR EOS was extended to gas mixtures using the van der Waals mixing rules and three types of combining rules. Two shock tube tests were modelled to validate the performance of the PR EOS with different combining rules. The model was also validated through comparison with the GERG-2008 EOS. In addition, decompression characteristics of a typical NG blended with 0%–30% hydrogen were studied. |
| Databáze: | OpenAIRE |
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